A090782 Numbers that can be expressed as the difference of the squares of primes in just three distinct ways.

120, 168, 312, 408, 480, 552, 600, 672, 720, 1008, 1200, 1800, 2160, 2472, 2832, 2880, 3312, 3672, 4560, 5040, 5640, 6120, 6480, 6528, 7248, 7320, 7752, 7872, 8160, 8352, 8400, 8712, 8880, 9048, 9768, 9960, 10032, 10200, 10320, 10488, 10608, 10848

Offset: 1

Author

Ray Chandler, Feb 14 2004

Keywords

• nonn

Examples

			120 = 13^2-7^2 = 17^2-13^2 = 31^2-29^2.
		

Crossrefs

Cf. A078667, A090788, A090781.